CN103540300B - 一种铬革屑增韧固井水泥浆及制备方法 - Google Patents

一种铬革屑增韧固井水泥浆及制备方法 Download PDF

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CN103540300B
CN103540300B CN201310451824.6A CN201310451824A CN103540300B CN 103540300 B CN103540300 B CN 103540300B CN 201310451824 A CN201310451824 A CN 201310451824A CN 103540300 B CN103540300 B CN 103540300B
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郭丽梅
王威
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LANGFANG CHRONOTECH PETROLEUM TECHNOLOGY Co Ltd
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Abstract

本发明涉及一种铬革屑增韧固井水泥浆及制备方法，其组成为：以水泥的重量为基准，各组分占水泥重量的百分比为：铬革屑：0.05-2.0%；降失水剂：1-5%；分散剂：0.5-2.5%；消泡剂：0.1-0.5%；缓凝剂：0-0.5%，按照API标准将各组分与一定量的水泥充分混合均匀，即得到本发明，本发明具有抗冲击性强，射孔对水泥环的破坏小，从根本上解决“二次窜流”问题，本发明中的有效成分具有提高水泥石的韧性和阻裂性，不影响水泥浆的工程性能，且成本低、减少制革废弃物对环境的污染，为制革行业废弃物回收再利用提供一条新途径。

Description

一种铬革屑增韧固井水泥浆及制备方法
技术领域
本发明属于油田固井水泥浆领域，尤其是一种铬革屑增韧固井水泥浆及制备方法。
背景技术
目前国内大多数油田已进入中后期开采阶段，为了提高油井寿命，保证稳产高产，固井质量成为油气固井工程所面临的突出问题。随着固井技术的不断发展，要求水泥环具有良好的力学延展性能与力学阻裂性能，以抵抗钻柱的冲击，以及射孔、压裂等各种破坏的要求。如果水泥环的力学性能达不到要求，就可能产生“二次窜流”的现象，甚至使水泥环的封隔作用彻底失效。因此，迫切需要一种能够提高水泥韧性，改善水泥力学性能，同时与水泥浆相容性好的添加剂。目前常用的固井水泥增韧纤维材料主要有石棉纤维、聚丙烯纤维、聚酯纤维等。
铬革屑是制革厂含铬皮革下脚料,因含有金属铬,一般认为是制革工业污染源之一,按其重量计算,约占皮革总重量的60%左右。如不能及时处理和充分利用,是对资源的极大浪费,同时对环境将造成严重污染。铬革屑的主要成分是胶原纤维，具有韧性，在水泥浆中的分散性能好、强度高，经过铬离子的鞣制，形成网状体系，抗冲击性（抗折强度）及耐水解性显著提高，是提高水泥韧性的理想材料。
据检索，发现如下关于铬革屑利用的专利文献，具体如下：
1、一种铬革屑钻井堵漏材料（CN102391844A），堵漏材料构成及其重量份数分别为：铬革屑40-100；助剂5-60，将上述铬革屑与助剂混合均匀，制备成40-100目粒度，即得到堵漏剂成品。
2、一种铬革屑与聚丙烯酰胺复合凝胶的制备方法（CN102443182A），步骤如下：(1)将聚丙烯酰胺用水配制成溶液；(2)将洛托品、亚硫酸钠、乙酸铬溶于水制备铬交联剂；(3)将铬交联剂加入到步骤(1)的聚丙烯酰胺溶液中，搅拌均匀；(4)加铬革屑到步骤(3)的溶液中，再加水溶性酚醛树脂，调节pH＝6-9；将上述溶液放置于45℃～85℃水浴中加热候凝，即得铬革屑与聚丙烯酰胺复合凝胶，所述各物质水溶液质量浓度为：铬革屑0.5％-10％，聚丙烯酰胺0.1％～0.6％，乌洛托品0.35％，亚硫酸钠0.3％-0.5％，乙酸铬0.02％-0.5％，水溶性酚醛树脂0.5％-1.0％。
包括上述文献在内，目前还没有将铬革屑用于固井水泥浆中的记载，本发明首次提出。
发明内容
本发明的目的是提供一种铬革屑增韧固井水泥浆及制备方法，本水泥浆将制革行业的固体废弃物-铬革屑作为固井水泥浆增韧剂，在科学又环保的同时，保证了水泥浆的工程性能。
本发明实现目的的技术方案如下：
一种铬革屑增韧固井水泥浆，包括水泥、水，还包括添加剂，所述添加剂的组分及各组分占水泥的重量百分数如下：
所述水：水泥的重量比为：0.3-0.5。
而且，所述的水泥为G级油井水泥。
而且，所述的铬革屑为经过高盘磨浆机加工制成直径0.02-0.05mm的纤维。
而且，所述的降失水剂为丙烯酰胺/丙烯酸钠共聚物或丙烯酰胺/2-丙烯酰胺-2-甲基丙磺酸钠(AM/AMPS)共聚物或聚乙烯醇的一种或几种。
而且，所述的分散剂为木质素磺酸盐或甲醛丙酮缩合物。
而且，所述的消泡剂为有机硅类消泡剂、磷酸酯类消泡剂至少一种。
而且，所述的缓凝剂为柠檬酸或马来酸/丙烯酸共聚物。
一种制备铬革屑增韧固井水泥浆的方法，所述的制备方法为按照API标准将水、各组分、水泥，充分混合均匀即可，所述水：水泥的重量比为：0.3-0.5。
本发明的优点及有益效果：
1、本发明使用皮革行业的有毒废弃物（铬革屑）作为固井水泥浆增韧剂，变废为宝，既环保又低成本，有效减少了制革废弃物对环境的污染，为制革行业废弃物回收再利用提供一条新途径。
2、本发明提供的铬革屑增韧剂，具有亲水性、与水泥浆体系相容性好的优点，克服了常用的常用水泥增韧材料憎水与水泥浆混合不均、需要进行亲水改性等问题。
3、本发明提供的固井水泥浆凝固后水泥石具有抗冲击性强的特性，射孔对水泥环的破坏小，从根本上解决“二次窜流”问题。
4、本发明提供的固井水泥浆添加增韧剂后提高了水泥石的韧性和阻裂性等力学性能，但不影响水泥浆的工程性能，如低失水、稠化时间可调。
附图说明
图1为本发明实例1铬革屑水泥浆稠化曲线。
图2为对比例水泥浆稠化曲线。
具体实施方法
下面通过实施例对本发明做进一步详述，所述实施例是说明性的，并非限定性的，不能以此限定本发明的保护范围。
实施例1：
一种铬革屑增韧固井水泥浆，各组分及重量分别为：
铬革屑（直径0.02mm）：4g
丙烯酰胺/2-丙烯酰胺-2-甲基丙磺酸钠(AM/AMPS)共聚物：32g
制备方法：按照API标准：将水、添加剂各组分、G级油井水泥，充分混合均匀即可。
实施例2：
一种铬革屑增韧固井水泥浆，各组分及重量分别为：
铬革屑（直径0.05mm）：1.6g
丙烯酰胺/2-丙烯酰胺-2-甲基丙磺酸钠(AM/AMPS)共聚物：16g
制备方法:按照API标准：将水、添加剂各组分、G级油井水泥，充分混合均匀即可。
实施例3：
一种铬革屑增韧固井水泥浆，各组分及重量分别为：
制备方法：按照API标准：将水、添加剂组分、G级油井水泥，充分混合均匀即可。
实施例4：
一种铬革屑增韧固井水泥浆，各组分及重量分别为：
制备方法：按照API标准将水、添加剂各组分、G级油井水泥，充分混合均匀即可。
实施例5：
一种铬革屑增韧固井水泥浆，各组分及重量分别为：
制备方法：按照API标准将水、添加剂各组分、G级油井水泥，充分混合均匀即可。
对比例：
各组分及重量分别为：
丙烯酰胺/2-丙烯酰胺-2-甲基丙磺酸钠（AM/AMPS）共聚物：32g
按照API标准：将水、添加剂各组分、G级油井水泥，充分混合均匀即可。
上述5个实例和1个对比例的水泥浆性能如下：
表1水泥浆基本性能

Claims (1)

1.一种铬革屑增韧固井水泥浆，包括水泥、水，其特征在于：还包括添加剂，所述添加剂的组分及各组分占水泥的重量百分数如下：
所述水：水泥的重量比为：0.3-0.5；所述的水泥为G级油井水泥；所述的铬革屑为经过高盘磨浆机加工制成直径0.02-0.05mm的纤维；所述的降失水剂为丙烯酰胺/丙烯酸钠共聚物或丙烯酰胺/2-丙烯酰胺-2-甲基丙磺酸钠共聚物或聚乙烯醇的一种或几种；所述的分散剂为木质素磺酸盐或甲醛丙酮缩合物；所述的消泡剂为有机硅类消泡剂、磷酸酯类消泡剂至少一种；所述的缓凝剂为柠檬酸或马来酸/丙烯酸共聚物；
制备方法为按照API标准将水、添加剂各组分、水泥，充分混合均匀即可。
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